Perhaps you should try some spelling variations:
thanh nhan » thanh phan, thanh san, thanh toan
thanh nha » thanh ha, thanh nga, thanh phan
nam thuc » nam thuoc, am thuc, nam thu
cam thuc » am thuc, cam thu, can thuc
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang x hoi. hieu ve ((cam thuc) or (nam thuc)) da ((thanh nha) OR (thanh nhan)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ve ((cam thuc) OR (nam thuc)) da ((thanh nha) OR (thanh nhan)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu ve ((cam thuc) or (nam thuc)) da ((thanh nha) OR (thanh nhan)) cuu tre*".